WAEC Past Questions and Answers - Page 3514

17,566.

The friction which exists between two layers of liquid in relative motion is called

A.

capillarity

B.

surface tension

C.

viscosity

D.

cohesion

Correct answer is C

No explanation has been provided for this answer.

17,567.

Which of the following statements about a spring balance and/or a chemical balance is not correct?

A.

the chemical balance operates on the principle of moments

B.

the spring balance operates on Hooke's law

C.

either may be used to measure the weight of a substance

D.

the reading of a spring balance changes over the surface of the earth, while that of the chemical balance remains constant

Correct answer is C

No explanation has been provided for this answer.

17,568.

Each of the following physical quantities is classified as a vector or a scalar quantity. Which of the classifications is correct?

A.

electric potential (Vector)

B.

momentum (scalar)

C.

gravitational field intensity (scalar)

D.

magnetic flux density (vector)

Correct answer is D

No explanation has been provided for this answer.

17,569.

Which of the following phenomena is the practical evidence for the existence of the continual motion of molecules?

A.

Translational motion

B.

rotational motion

C.

brownian motion

D.

oscillatory motion

Correct answer is C

No explanation has been provided for this answer.

17,570.

In an experiment using a converging lens to produce real images on a screen, the linear magnification m, is plotted against the image distance v, as illustrated in the diagram below. The distance OP represents the

A.

focal length of the lens

B.

thickness of the lens

C.

radius of curvature of the lens

D.

diameter of the lens

Correct answer is C

No explanation has been provided for this answer.